18816801443 has 4 divisors (see below), whose sum is σ = 20527419768. Its totient is φ = 17106183120.

The previous prime is 18816801439. The next prime is 18816801473. The reversal of 18816801443 is 34410861881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18816801443 - 2² = 18816801439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18816801394 and 18816801403.

It is not an unprimeable number, because it can be changed into a prime (18816801473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855309146 + ... + 855309167.

It is an arithmetic number, because the mean of its divisors is an integer number (5131854942).

Almost surely, 2^18816801443 is an apocalyptic number.

18816801443 is a deficient number, since it is larger than the sum of its proper divisors (1710618325).

18816801443 is a wasteful number, since it uses less digits than its factorization.

18816801443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710618324.

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 18816801443 in words is "eighteen billion, eight hundred sixteen million, eight hundred one thousand, four hundred forty-three".